1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
// Copyright (C) 2015 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 25.4.5.3
description: >
Promise reaction jobs do not check for cyclic resolutions.
info: >
Promise.prototype.then ( onFulfilled , onRejected )
...
5. Let resultCapability be NewPromiseCapability(C).
6. ReturnIfAbrupt(resultCapability).
7. Return PerformPromiseThen(promise, onFulfilled, onRejected, resultCapability).
25.4.5.3.1 PerformPromiseThen ( promise, onFulfilled, onRejected, resultCapability )
...
3. If IsCallable(onFulfilled) is false, then
a. Let onFulfilled be "Identity".
4. If IsCallable(onRejected) is false, then
a. Let onRejected be "Thrower".
5. Let fulfillReaction be the PromiseReaction { [[Capabilities]]: resultCapability, [[Handler]]: onFulfilled }.
6. Let rejectReaction be the PromiseReaction { [[Capabilities]]: resultCapability, [[Handler]]: onRejected}.
...
8. Else if the value of promise's [[PromiseState]] internal slot is "fulfilled",
a. Let value be the value of promise's [[PromiseResult]] internal slot.
b. Perform EnqueueJob("PromiseJobs", PromiseReactionJob, «fulfillReaction, value»).
...
25.4.2.1 PromiseReactionJob ( reaction, argument )
...
4. If handler is "Identity", let handlerResult be NormalCompletion(argument).
...
8. Let status be Call(promiseCapability.[[Resolve]], undefined, «handlerResult.[[value]]»).
9. NextJob Completion(status).
---*/
var createBadPromise = false;
var object = {};
class P extends Promise {
constructor(executor) {
if (createBadPromise) {
executor(
function(v) {
assert.sameValue(v, object);
$DONE();
},
function(e) {
$DONE(e);
}
);
return object;
}
return super(executor);
}
}
var p = P.resolve(object);
createBadPromise = true;
var q = p.then();
createBadPromise = false;
assert.sameValue(q, object, "then() returns object");
|
